CN201229790Y - Over-hanging electric cable - Google Patents
Over-hanging electric cable Download PDFInfo
- Publication number
- CN201229790Y CN201229790Y CNU2008201216234U CN200820121623U CN201229790Y CN 201229790 Y CN201229790 Y CN 201229790Y CN U2008201216234 U CNU2008201216234 U CN U2008201216234U CN 200820121623 U CN200820121623 U CN 200820121623U CN 201229790 Y CN201229790 Y CN 201229790Y
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- China
- Prior art keywords
- stranded conductor
- conductor layer
- layer
- aluminium stranded
- aerial cable
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The utility model discloses an aerial cable which includes a reinforced core and an aluminum stranded conductor layer; the aluminum stranded conductor layer is divided into an outer aluminum stranded conductor layer and an inner aluminum stranded conductor layer; the outer aluminum stranded conductor and the inner aluminum stranded conductor are respectively twisted by a plurality of aluminum wires; single aluminum wire is coated with an isolating layer; the aerial cable has the advantages that the single aluminum wire is coated or wrapped with the isolating layer and can not be affected with each other due to the electric fields generated by neighboring leads during the transmission process of an alternating current( the phenomenon that the current density in side each lead is not uniformly distributed caused by the mutual approaching of the leads is called proximity effect), thereby eliminating the current resistance caused by the socalled 'crowd current', thus leading the current transmission to be distributed on each lead, thereby greatly increasing the effective area of a cable conductor, reducing the resistance of the conductor and reducing the power consumption.
Description
Technical field
The utility model relates to a kind of cable, especially relates to a kind of aerial cable.
Background technology
Aerial cable is used for carrying alternating current, and aerial cable comprises strengthening core and aluminium stranded conductor layer, and strengthening core is arranged on the center of aluminium stranded conductor layer.Usually the aluminium stranded conductor layer is divided into outer aluminium stranded conductor layer and interior aluminium stranded conductor layer, and interior aluminium stranded conductor layer is that many bare aluminium wires are counter clockwise direction stranded forming in center with the strengthening core, and outer aluminium stranded conductor layer is that to be that the center clockwise direction is stranded with the strengthening core form many bare aluminium wires.When alternating current passed through the aluminium stranded conductor layer of aerial cable, because induction effect causes that CURRENT DISTRIBUTION is inhomogeneous on the aluminium stranded conductor layer cross section, the nearly aluminium stranded conductor laminar surface current density that heals was big more, and this phenomenon claims " skin effect ".Skin effect increases the effective resistance of aerial cable, has consumed the electric energy in the transmission.Bare aluminium wire particularly under the effect of acid rain, makes aluminium stranded conductor top layer accelerated oxidation at rainwater, influences electric conductivity, reduces useful life.Meteorological condition is outstanding especially to the influence of the corona loss of bare wire, and during fine weather, the corona loss of every kilometer transmission line may be less than 1 kilowatt, and bad weathers such as rain, mist, snow then can reach tens kilowatts every kilometer even tens kilowatts.
Harmonic wave that harmonic wave that the harmonic wave that exists in the network system, electrical power trans mission/distribution system produce and power consumption equipment produce or the like pollutes the AC resistance that causes cable conductor and increases, make the permission of cable reduce by electric current, harm to weak electricity system equipment, low voltage switchgear, communication equipment or the like is very big simultaneously, harmonic wave increases the copper loss of transformer, all to increase because of the stray loss that leakage flux causes comprising eddy current loss in resistance loss, the conductor and conductor outside, thus the capacity of waste electrical network.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of aerial cable that can reduce electric energy loss.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of aerial cable, comprise strengthening core and aluminium stranded conductor layer, described aluminium stranded conductor layer is divided into outer aluminium stranded conductor layer and interior aluminium stranded conductor layer, described outer aluminium stranded conductor layer and described interior aluminium stranded conductor layer are coated with insulating barrier respectively by many stranded the forming of aluminum steel on the described single aluminum steel.
Described insulating barrier is insulation enamelled coating or nylon layer.
Between described insulating barrier and the described aluminum steel copper layer is set.
Described insulating barrier is outside equipped with watertight composition.
Described watertight composition is the fluorine material layer, and the thickness of described fluorine material layer is 0.01mm～1mm.
Described fluorine material layer is fluoropolymer resin layer or fluorine-containing organic coating layer or the first fluoro-containing plastic layer or fluoropolymer layer or polytetrafluoroethylene floor.
The aluminium stranded conductor layer is that many aluminum steels are that the center clockwise direction is stranded with the strengthening core in described, and described outer aluminium stranded conductor layer is that many aluminum steels are that the center is with counterclockwise stranded with the strengthening core.
The aluminium stranded conductor layer is that many aluminum steels are that the center is counterclockwise stranded with the strengthening core in described, and described outer aluminium stranded conductor layer is that many aluminum steels are that the center is stranded in a clockwise direction with the strengthening core.
The thickness of described fluorine material layer is 0.08mm.
The aluminum steel number of aluminium stranded conductor layer is 10 in described, and the aluminum steel number of described outer aluminium stranded conductor layer is 15, and the aluminum steel of described interior aluminium stranded conductor layer is 1/1.5 with the pitch ratio of the aluminum steel of outer aluminium stranded conductor layer.Pitch: an independent single line forms the axial length of a complete spiral coil in twisted wire.
Be coated with the second fluoro-containing plastic layer on the described outer aluminium stranded conductor layer, the thickness of the described second fluoro-containing plastic layer is 0.01mm～1mm.
Compared with prior art, advantage of the present utility model is to apply or be coated with on the single aluminum steel insulating barrier, electric current can not interact because of the magnetic field that adjacent wires produced (current density no longer is that equally distributed this phenomenon is called proximity effect to lead in each lead near making mutually) in the transmission course of alternating current, thereby eliminates the AC resistance that so-called " crowded electric current " causes.Current delivery is distributed on the every lead, has increased considerably the effective area of cable conductor, lowered the impedance of conductor, reduced the loss of electric weight.
Compare traditional filter apparatus, every each section cable of its advantage itself is equivalent to a filter inductor, it can effectively intercept or weaken the harmonic wave from the upper frequency of different directions, in the transmission of high-quality electrical network, played positive effect, reduced power network line laying institute and surrounding environment width of cloth blackberry lily has been disturbed, significantly reduced the equipment input that harmonic wave is handled, the conservation of power energy through part, prolong the useful life of cable, save maintenance cost.The ability of its inductance reduced harmonic has further improved power factor, saves a large amount of electric power energies.
Experimental results show that: copper aluminium volume is that 17% o'clock interchange ampacity is 85% of a pure copper wire.Between insulating barrier and the described aluminum steel copper layer is set, the copper layer is very thin, under the situation that increases few weight, increases substantially the conductance of aluminum steel cable.
The watertight composition that is provided with can prevent that rainwater, particularly acid rain from penetrating into the aluminium stranded conductor layer, with aluminium conductor generation chemical reaction.Therefore increased the useful life of cable.
Ultra-thin fluorine material layer has good thermal diffusivity when having water proofing property, avoid reducing conductance because the temperature of aluminium conductor raises.
Outer aluminium stranded conductor layer is with counterclockwise stranded (left side strand to), interior aluminium stranded conductor layer stranded in a clockwise direction (right strand to), every conductor is owing to forming an inductance with adjacent conductor mutual insulating, how many root core numbers outer and internal layer has equal what inductance coils, the internal layer inductance is opposite with outer inductance direction again, the insulating barrier that needs every aluminum steel connecting end to end cable during installation is peeled off, promptly forms the effect of filtering after the energising in parallel of the aluminum steel of ectonexine.Because the core number of internal layer aluminum steel lacks than outer aluminum steel, for the inductance that reaches ectonexine is offset fully, the pitch of internal layer aluminum steel is littler than the pitch of outer aluminum steel, and the axial length that a single line of outer aluminum steel forms a complete spiral coil is bigger than the axial length of a complete spiral coil of a single line formation of internal layer aluminum steel.
The outer aluminium stranded conductor layer that adopts is identical with the existing cable structure or opposite with the stranded mode of interior aluminium stranded conductor layer, available existing manufacturing equipment, production cost increases few, simultaneously in use not can with other aerial cable mutual interference mutually, guarantee the normal transmission of alternating current.
Be coated with the second fluoro-containing plastic layer on the outer aluminium stranded conductor layer, the thickness of the described second fluoro-containing plastic layer is 0.01mm～1mm.The fluoro-containing plastic layer can prevent that rainwater, particularly acid rain from penetrating into the aluminium stranded conductor layer, with aluminium conductor generation chemical reaction.Therefore increased the useful life of cable.
The not sticking characteristic of the cable outer layer surface fluorine material layer after the installation can be resisted acidic rain water and the not frost that do not freeze, its good heat resistance works in-65 °～+ 250 ° safely, ultra-thin thickness does not influence the heat radiation of cable high-temperature simultaneously yet, and the high pressure resistant insulation ability is defendd the aerial metal destruction of thing to supply line of wafing better.The fluorine material layer can well be isolated the influence to cable of rain, mist, snow, eliminates because the corona loss that meteorological condition causes.Distance between the electric power tower is approximately 300 meters to 500 meters, can obtain no small inductance value by the opposite separately stranded inductance coil that forms of cable ectonexine, inductance coil intercepts or weakens the higher harmonic current of frequency in the impedance under the high frequency by increasing circuit, weaken the high order harmonic component composition in the output current effectively, weaken the impact of surge current in the circuit, by suppressing harmonic current power factor is significantly improved, save a large amount of electric power energies, also resist simultaneously aerial multiple radio interference source, reduce the power network line interference of communication equipment to external world, the electromagnetic radiation that reduces harmonic wave directly influences people's brain magnetic field and core field.
Description of drawings
Fig. 1 is a structure chart of the present utility model;
Fig. 2 is the structure chart of single aluminum steel of the present utility model;
Fig. 3 is the utility model structure cutaway view.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Embodiment one: a kind of aerial cable, comprise strengthening core 1 and aluminium stranded conductor layer 2, aluminium stranded conductor layer 2 is divided into outer aluminium stranded conductor layer 21 and interior aluminium stranded conductor layer 22, and outer aluminium stranded conductor layer 21 and interior aluminium stranded conductor layer 22 by many aluminum steels 3 stranded forming, are coated with insulating barrier 4 on the single aluminum steel 3 respectively.Insulating barrier 4 is insulation enamelled coating or nylon layer.Between insulating barrier 4 and the aluminum steel 3 copper layer 5 is set.Insulating barrier 4 is outside equipped with watertight composition 6.Watertight composition 6 is a fluoropolymer resin layer, and the thickness of fluoropolymer resin layer is 0.02mm.Interior aluminium stranded conductor layer 22 is many aluminum steels 3 with strengthening core 1 is center clockwise direction stranded (right strand to), and outer aluminium stranded conductor layer 21 be many aluminum steels 3 with strengthening core 1 be the center with counterclockwise stranded (left twist to).The aluminum steel number of interior aluminium stranded conductor layer is 10, and the aluminum steel number of outer aluminium stranded conductor layer 21 is 15, and the aluminum steel of interior aluminium stranded conductor layer 22 is 1/1.5 with the pitch ratio of the aluminum steel of outer aluminium stranded conductor layer 21.The thickness that is coated with the second fluoro-containing plastic layer, 7, the second fluoro-containing plastic layer 7 on the outer aluminium stranded conductor layer 21 is 0.01mm.
Embodiment two: a kind of aerial cable, comprise strengthening core 1 and aluminium stranded conductor layer 2, aluminium stranded conductor layer 2 is divided into outer aluminium stranded conductor layer 21 and interior aluminium stranded conductor layer 22, and outer aluminium stranded conductor layer 21 and interior aluminium stranded conductor layer 22 by many aluminum steels 3 stranded forming, are coated with insulating barrier 4 on the single aluminum steel 3 respectively.Insulating barrier 4 is insulation enamelled coating or nylon layer.Between insulating barrier 4 and the aluminum steel 3 copper layer 5 is set.Insulating barrier 4 is outside equipped with watertight composition 6.Watertight composition 6 is fluorine-containing organic coating layer, and the thickness of fluorine-containing organic coating layer is 0.08mm.Interior aluminium stranded conductor layer 22 is many aluminum steels 3 with strengthening core 1 is center clockwise direction stranded (right strand to), and outer aluminium stranded conductor layer 21 be many aluminum steels 3 with strengthening core 1 be the center with counterclockwise stranded (left twist to).The aluminum steel number of interior aluminium stranded conductor layer 22 is 10, and the aluminum steel number of outer aluminium stranded conductor layer 21 is 15, and the aluminum steel of interior aluminium stranded conductor layer 22 is 1/1.5 with the pitch ratio of the aluminum steel of outer aluminium stranded conductor layer 21.The thickness that is coated with the second fluoro-containing plastic layer, 7, the second fluoro-containing plastic layer 7 on the outer aluminium stranded conductor layer 21 is 0.1mm.
Embodiment three: a kind of aerial cable, comprise strengthening core 1 and aluminium stranded conductor layer 2, aluminium stranded conductor layer 2 is divided into outer aluminium stranded conductor layer 21 and interior aluminium stranded conductor layer 22, and outer aluminium stranded conductor layer 21 and interior aluminium stranded conductor layer 22 by many aluminum steels 3 stranded forming, are coated with insulating barrier 4 on the single aluminum steel 3 respectively.Insulating barrier 4 is insulation enamelled coating or nylon layer.Between insulating barrier 4 and the aluminum steel 3 copper layer 5 is set.Insulating barrier 4 is outside equipped with watertight composition 6.Watertight composition 6 is the polytetrafluoroethylene floor or the first fluoro-containing plastic layer, and the thickness of the polytetrafluoroethylene floor or the first fluoro-containing plastic layer is 0.6mm.Interior aluminium stranded conductor layer 22 is many aluminum steels 3 with strengthening core 1 is center clockwise direction stranded (right strand to), and outer aluminium stranded conductor layer 21 be many aluminum steels 3 with strengthening core 1 be the center with counterclockwise stranded (left twist to).The aluminum steel number of interior aluminium stranded conductor layer 22 is 10, and the aluminum steel number of outer aluminium stranded conductor layer 21 is 15, and the aluminum steel of interior aluminium stranded conductor layer 22 is 1/1.5 with the pitch ratio of the aluminum steel of outer aluminium stranded conductor layer 21.The thickness that is coated with the second fluoro-containing plastic layer, 7, the second fluoro-containing plastic layer 7 on the outer aluminium stranded conductor layer 21 is 1mm.
Embodiment four: identical with embodiment one other parts, aluminium stranded conductor layer 22 be center counterclockwise stranded (left side twist to) for many aluminum steels 3 with strengthening core 1 in difference was, outer aluminium stranded conductor layer 21 is many aluminum steels 3 with strengthening core 1 is center stranded in a clockwise direction (left side strand to), and watertight composition 6 is a fluoropolymer layer.
Claims (10)
1. aerial cable, comprise strengthening core and aluminium stranded conductor layer, described aluminium stranded conductor layer is divided into outer aluminium stranded conductor layer and interior aluminium stranded conductor layer, and described outer aluminium stranded conductor layer and described interior aluminium stranded conductor layer is characterized in that being coated with insulating barrier on the described single aluminum steel respectively by many stranded the forming of aluminum steel.
2. a kind of aerial cable according to claim 1 is characterized in that described insulating barrier is insulation enamelled coating or nylon layer.
3. a kind of aerial cable according to claim 1 is characterized in that between described insulating barrier and the described aluminum steel copper layer being set.
4. a kind of aerial cable according to claim 3 is characterized in that described insulating barrier is outside equipped with watertight composition.
5. a kind of aerial cable according to claim 4 is characterized in that described watertight composition is the fluorine material layer, and the thickness of described fluorine material layer is 0.01mm～1mm.
6. a kind of aerial cable according to claim 5 is characterized in that described fluorine material layer is fluoropolymer resin layer or fluorine-containing organic coating layer or the first fluoro-containing plastic layer or fluoropolymer layer or polytetrafluoroethylene floor.
7. a kind of aerial cable according to claim 1 is characterized in that described interior aluminium stranded conductor layer is that many aluminum steels are that the center clockwise direction is stranded with the strengthening core, and described outer aluminium stranded conductor layer is that many aluminum steels are that the center is with counterclockwise stranded with the strengthening core.
8. a kind of aerial cable according to claim 5, the thickness that it is characterized in that described fluorine material layer is 0.08mm.
9. a kind of aerial cable according to claim 7, the aluminum steel number that it is characterized in that described interior aluminium stranded conductor layer is 10, the aluminum steel number of described outer aluminium stranded conductor layer is 15, and the aluminum steel of described interior aluminium stranded conductor layer is 1/1.5 with the pitch ratio of the aluminum steel of outer aluminium stranded conductor layer.
10. a kind of aerial cable according to claim 1 is characterized in that being coated with the second fluoro-containing plastic layer on the described outer aluminium stranded conductor layer, and the thickness of the described second fluoro-containing plastic layer is 0.01mm～1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201216234U CN201229790Y (en) | 2008-07-18 | 2008-07-18 | Over-hanging electric cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201216234U CN201229790Y (en) | 2008-07-18 | 2008-07-18 | Over-hanging electric cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201229790Y true CN201229790Y (en) | 2009-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201216234U Expired - Fee Related CN201229790Y (en) | 2008-07-18 | 2008-07-18 | Over-hanging electric cable |
Country Status (1)
| Country | Link |
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| CN (1) | CN201229790Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329928B (en) * | 2008-07-17 | 2011-05-18 | 宁波万博新材料科技有限公司 | Aerial cable |
| CN102347104A (en) * | 2011-06-24 | 2012-02-08 | 四川明星电缆股份有限公司 | 7 split conductor with cable copper core section of 3500mm<2> and manufacturing method thereof |
-
2008
- 2008-07-18 CN CNU2008201216234U patent/CN201229790Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329928B (en) * | 2008-07-17 | 2011-05-18 | 宁波万博新材料科技有限公司 | Aerial cable |
| CN102347104A (en) * | 2011-06-24 | 2012-02-08 | 四川明星电缆股份有限公司 | 7 split conductor with cable copper core section of 3500mm<2> and manufacturing method thereof |
| CN102347104B (en) * | 2011-06-24 | 2013-06-12 | 四川明星电缆股份有限公司 | 7 split conductor with cable copper core section of 3500mm<2> and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090429 Termination date: 20110718 |